Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 218 [Rate centres in NPA 218] [Dial plan for NPA 218]

NXX: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
218-637 A Mentor MN MNTRMNXMRS6  1395 GARDEN VALLEY TEL. CO. 636      
218-637 0 Mentor MN   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 636      
218-637 1 Mentor MN   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 636      
218-637 2 Mentor MN   1395 GARDEN VALLEY TEL. CO. 636      
218-637 3 Mentor MN   1395 GARDEN VALLEY TEL. CO. 636      
218-637 4 Mentor MN   1395 GARDEN VALLEY TEL. CO. 636      
218-637 5 Mentor MN   1395 GARDEN VALLEY TEL. CO. 636      
218-637 6 Mentor MN   1395 GARDEN VALLEY TEL. CO. 636      
218-637 7 Mentor MN   1395 GARDEN VALLEY TEL. CO. 636      
218-637 8 Mentor MN   1395 GARDEN VALLEY TEL. CO. 636      
218-637 9 Mentor MN   1395 GARDEN VALLEY TEL. CO. 636      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.